diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 78049ea..b320b10 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -22,13 +22,20 @@
 
 #define BTRFS_IOCTL_MAGIC 0x94
 #define BTRFS_VOL_NAME_MAX 255
-#define BTRFS_PATH_NAME_MAX 3072
+#define BTRFS_PATH_NAME_MAX 4087
 
+/* this should be 4k */
 struct btrfs_ioctl_vol_args {
 	__s64 fd;
 	char name[BTRFS_PATH_NAME_MAX + 1];
 };
 
+struct btrfs_ioctl_clone_range_args {
+  __s64 src_fd;
+  __u64 src_offset, src_length;
+  __u64 dest_offset;
+};
+
 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
 				   struct btrfs_ioctl_vol_args)
 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
@@ -52,11 +59,6 @@
 				   struct btrfs_ioctl_vol_args)
 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
 				   struct btrfs_ioctl_vol_args)
-struct btrfs_ioctl_clone_range_args {
-  __s64 src_fd;
-  __u64 src_offset, src_length;
-  __u64 dest_offset;
-};
 
 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
 				  struct btrfs_ioctl_clone_range_args)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index b4c101d9..92c9b54 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -582,7 +582,7 @@
 {
 	struct btrfs_ioctl_vol_args *vol;
 	struct btrfs_fs_devices *fs_devices;
-	int ret = 0;
+	int ret = -ENOTTY;
 	int len;
 
 	if (!capable(CAP_SYS_ADMIN))
@@ -594,6 +594,7 @@
 		goto out;
 	}
 	len = strnlen(vol->name, BTRFS_PATH_NAME_MAX);
+
 	switch (cmd) {
 	case BTRFS_IOC_SCAN_DEV:
 		ret = btrfs_scan_one_device(vol->name, FMODE_READ,